Process for forming a vapor-proof material.



g-mrrnsPA E T orrionf .1nnvrs 3. Hanson, or nnrnorr, MICHIGAN, Assrenon, BY MESNE ASSIGNMENTS,

TO DETROIT CAN COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF NEW JERSEY.

No Drawing.

Specification of Letters Patent.

I rnocnss 'ron FORMING a VAPOR-PROOF MATERIAL.

To (ZZZ whom it concern: I

Be it known that I, JERVIS REHARBECK, a

citizen of the United States, and residing at Detroit, in the county of lVayne and State of Michigan, have invented a new and useful Process for F ormin a'Vapor-Proof Material, of which the ollowing is a specifica- .My invention relates to the manufacture of containers from paper, straw-board and other fibrous material, and its object is to I provide a container that shall be impervious .to vapors and gases. I I I It has been possible for some time to manufacture- I containers of fibrous materials which are adapted for shipping and storing liquids, but trouble has been experienced in I the production at a reasonable cost of a conwhich would be adapted for the shipment or .storage of materials which-are affected by tainer which will prevent even the ininutest portion of these liquids from evaporating or minute amounts of vapors and gases from 1 .the surrounding atmosphere.

- Ordinarily, glues and other cements while I in liquid form contain" large quantities 'of water or other solvents that evaporate as the v v glue hardens. The spaces occupied by these I powder, borax, dehydrated-vegetables and solvents and the passages through which 'their vapors escape permit the vapors of the liquid contents of the containers to pass through and surrounding gases and vaporsto penetrate. Under ordinary conditions this is immaterial but containers for the shipment and stora e of baking powder, gun

i .many other substances must be absolutely Vapor proof. To render the walls of contamers impervious to vapors and gases it s passages mentioned above, and-this may be necessary to fill the small capillary canals or accomplished'in a number of different ways of which several are as follows: Into the hot glue or other cement emfployed to unite the:

different thicknesses 0 tube material a I fusible substance, preferablyinthe form of o'wder-is stirred,.which fusible substance ahigher melt-ihg point than the'tetnpen;

'iaturefofthe hot cement. The cementis ap-*' I plied to the fibrous material in any desired T'manner and the material wound up 'into atube and allowed to dry. After the solvent of the-cement has thoroughly evaporated the and same, but any other may be employed.

Patented May 28, 1912. Application filed October 15, 1908. Serial No; 457,861.

fills the canals and small passages that have i About one part of goodglue, one part of powdered dammar gum, and two parts of water by weight form a good proportion ofmaterials.

Another manner of preparing the containers is, to introduce into the hot liquid cement a fusible material which is insoluble by the solvent of the cement. but which has a lower melting point than the cement, and will therefore remain in suspension in the cementafter it itself has been melted. The bodies are formed in the usual manner and after the solvent has evaporated'the tubes are heated to melt the fusible material,

which as before stated, fills up the capillary passages. It will beseen thatv any of the' substances mentioned before may be employed with cement that works best at a high temperature orstearine may be used with ordinary glue.

I Another manner for forming impervious container bodies is to coat the material with cement,'and before the thicknesses are placed in cont-act, to dust a layer of fusible powder oventhe cement. After the body is formed the solvent of the cement is permitted to evaporate and the body is heated to melt the fusible material as beforejstated." 1

Still another manner of forming these container bodies is to coat one side of the fibrbus material with the fusible substance.

The same side or the other side of the sheet is ,coated :with: the, cement, the material is formed into a container body, the solvent is allowed to evaporate fandj then the body is heated to melt: the fusible substance. InI coating the fibrous sheets with this fusible substance the coating may-be either in the form of a solution, the'substa'nce' may be vheld in suspension in 'a. liquid which will leave the substance deposited lupon or. at

tached to fthe fibrous material, or the substance may. be fused and-applied hot Another very desirable manner offform- 1 ing impervious containers is to incorporate one of the fusible substances mentionedbetubegis heated to a temperature sufficient to, fore-in the body of the sheet while the fibrous 55' me1t the fusible substance which thereupon material is beingformed. The container i i bodies are formed in the usual manner and after the solvent has evaporated the container body is' heated to melt the fusible material, which as before stated, will fill the capillary passages in the fibrous material. Or the container may be formed by folding I or bending the sheet and fastening it together to form the well known forms of paper pails for oysters and ice cream. The sheet may be heated before or after the container is formed therefrom.

Another manner of forming these tubes and container bodies is to dissolve a fusible substance, such as the varnish gufns, in a proper solvent to form the cement. After the solvent has evaporated, the body is heated to such a temperature that the fusible- I several thicknesses held together by a cement as above explained and be secured in place before the container body is heated,- but ordinarily only one such head is ad'-' visable. The other is preferably made of tin andsecured to the body in any well known manner.

Having now explained my improvements,

what I claim as my invention and desire to secure by Letters Patent is 1. The rocess of manufacturing amul- .t-itply fabrlc consisting in cementing 'plies o fabric together with a liquid cement embodying a volatile solvent and a fusible materi-al, evaporating the volatile solvent and then heating to fuse the fusible material so that it shall fill the pores in the fabric through which the volatile solventhas escaped.

2. The process of manufacturing a multiply fabric consisting in cementmg plies of fibrous material together by a'liquid cement embodying a fusible gum'and a volatile solvent, evaporating the volatile solvent and then heating ,to fuse the gum so that it shall fill the pores in the fibrous material through which the volatile solvent has escaped. a

3.'The process of manufacturing a multi'ply fabric, consisting in cement1ng plies together. with a compound consisting of a cement, a'volatile solvent for the same, and

a fusible material, evaporating the solvent, and then heating the fabric to fuse the fusible material between the plies so that it, shall fill the pores in the fabric through which the solvent has escaped. Y

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

JERVIS R. HARBECK. Witnesses H. w. WHITE, Jr,

V. C. SNYDER. 

